<?php

/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Interface.php 16223 2009-06-21 20:04:53Z thomas $
 */


/**
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
interface Zend_Validate_Interface
{
	/**
	 * Returns true if and only if $value meets the validation requirements
	 *
	 * If $value fails validation, then this method returns false, and
	 * getMessages() will return an array of messages that explain why the
	 * validation failed.
	 *
	 * @param  mixed $value
	 * @return boolean
	 * @throws Zend_Valid_Exception If validation of $value is impossible
	 */
	public function isValid($value);

	/**
	 * Returns an array of messages that explain why the most recent isValid()
	 * call returned false. The array keys are validation failure message identifiers,
	 * and the array values are the corresponding human-readable message strings.
	 *
	 * If isValid() was never called or if the most recent isValid() call
	 * returned true, then this method returns an empty array.
	 *
	 * @return array
	 */
	public function getMessages();

	/**
	 * Returns an array of message codes that explain why a previous isValid() call
	 * returned false.
	 *
	 * If isValid() was never called or if the most recent isValid() call
	 * returned true, then this method returns an empty array.
	 *
	 * This is now the same as calling array_keys() on the return value from getMessages().
	 *
	 * @return array
	 * @deprecated Since 1.5.0
	 */
	public function getErrors();

}
